Woolworth Building, switchboard.

Woolworth Building. Detail of switchboard.

Woolworth Building, vault.

Woolworth Building, swimming tank.

Woolworth Building, general exterior.

Woolworth Building, engine room.

Woolworth Building, rendering.

Woolworth Building, boiler room.

Woolworth Building. Engine room.

Woolworth Building. Grand staircase.

Woolworth Building. Grand staircase.

Woolworth Building, engine room.

Woolworth Building, boiler room.

Woolworth Building, engine room.

Woolworth Building. Swimming tank.

Woolworth Building. Pump room.

Woolworth Building. Boiler room.

Woolworth Building. Corridor on 24th Floor, Woolworth offices.

Woolworth Building

Woolworth Building. Safe deposit vault.